The Nambu-Jona Lasinio mechanism and electroweak symmetry breaking in the Standard Model

In this paper I examine the breaking of internal symmetries from another point of view showing that is possible to reproduce the electroweak panorama of the traditional Standard Model in a exhaustive and self consistent way. The result is reached applying the main futures of the old Nambu-Jona Lasinio (NJL) mechanism to an electroweak invariant Lagrangian. In this context the use of functional formalism for composite operators naturally leads to a different dynamical approach. While the Higgs mechanism acts on the Lagrangian form, a NJL like model looks directly at the physics of the system showing the real dynamical content hidden in the Green functions of the theory.